Question

given the emissions shown in vials 1-5, rank the vials in order of increasing wavelength

Part 05 point Part 2 (0.5 point Part 3 10.5 point PIC.COLLAGE

1)given the emissions shown in vials 1-5, rank the vials in order of increasing wavelength

purple-orange-red-blue-green

small to large

2)given the emissions shown in vials 1-5 rank the vials of order of increasing frequency

purple-orange-green-red-blue

small to large frequency

3)given the emissions shown in vials 1-5 rank the vials in order of increasing energy emission

red-green-orange-purple-blue

small to large frequency

4)given the emissions shown in vials 1-5 rank the order of increasing quantum dot size

purple-blue-res-orange-green

small to large size

Answer 1

Answer :-

1) The rank of the 5 vials in order of increasing wavelength($\lambda$) will be :

Purple-Blue-Green-Orange-Red

  $\lambda$ in nm = Purple (380-450)-Blue(450–485)-Green(500–565)-Orange(590–625)-Red(625–740)

2) As frequency and wavelength are inversely proportional to each other, the rank of the 5 vials in order of     increasing frequency($\nu$)  will be :

Red-Orange-Green-Blue-Purple
(1 x 1/v)

$\nu$ in Hz [*10^(14)] : Red(4.05-4.8)-Orange(4.8-5.1)-Green(5.3-6.0)-Blue(6.2-6.8)-Purple(6.8-7.9)

{Note : The actual value for eg. is 4.05*10^(14) - 4.8*10^(14). Same applies for all values of frequency over here.}

3) As frequency and energy(or energy emission) are directly proportional to each other, the rank of the 5 vials in order of increasing energy emission(E) will be :

  Red-Orange-Green-Blue-Purple
(Εαν)

E in eV = Red(1.65–2.00)-Orange(2.00–2.10)-Green(2.25–2.34)-Blue(2.64–2.75)-Purple(2.95–3.10)

4) Wavelengths of light emitted by a quantum dot(QD) depends on its size. As the size decreases, the wavelength   emitted also shortens and vice-versa. So, the rank of the 5 vials in order of increasing quantum dot size will be :

Purple-Blue-Green-Orange-Red

QD size in nm = 2-3 nm for Purple-Blue-Green and 5-6 nm for Orange-Red

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